Katie Hill, a program associate with the Walker Art Center, shows a frame from a cat video of a cat playing the piano, in Minneapolis. The Walker presented an inaugural Internet Cat Video Film Festival in August to showcase the best in filmed feline hijinks -- 80 videos total -- and drew a crowd of more than 10,000 people. (Aug. 29, 2012)

(Credit: AP)

Cat Video Film Festival attendee Mike Bridavsky and his cat Lil Bub, left, pose with Golden Kitty Award-winner William Braden. The inaugural festival was held at the Walker Art Center in Minneapolis in August. (Aug. 30, 2012)

(Credit: AP)

Henri, le Chat Noir, in a scene from the video, "Henri 2, Paw de Deux," by William Braden. The cat video won the Golden Kitty Award at the Walker Art Center's Internet Cat Video Festival on August 30, 2012, in Minneapolis.

(Credit: AP)

Henri, le Chat Noir, star of "Henri 2, Paw de Deux." His portrait appears on his Facebook page and Twitter, and Henri's first book is scheduled for an April 2013 release.

(Credit: AP)

The I Can Has Cheezburger site allows users to generate captions on cat photos using LOLcat speak, a language with spelling and syntax all its own.